On 6/6/23 04:25, Bill Degnan via cctalk wrote: > There were a articles in the more technical journal-type mags 1981/82 that > discussed porting IBM DOS to non IBM 8088 systems that go into the > mechanics of it. DOS v 1.25 was the OEM version for the early ports. > *indirectly* from these you might find references to IBM BIOS porting and > who did it, there. I have only print copies no scans.
I was there, doing just that. Initially, we at Durango didn't think that strict 5150 compatibility at the BIOS level was necessary for the Poppy. In fact, as OEMs, DOS 1.25 was delivered with only a sample IO.SYS meant as a "skeleton". MS-DOS text mode, like CP/M, was considered to be good enough. In fact, MSDOS was never intended to be the ultimate target, but rather an interim goal as we waited for Intel to complete the kernel for Xenix on the 80286. Right from the first unit, we had sockets for both the 80186 and the 80286. Console I/O was done via serial connection. It's a shame that few know about the early 80286 systems. --Chuck
